input[type='radio'] {
    width: 100%;
    height: 100%;
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    border: 1px solid #ccc;
    position: absolute;
    vertical-align: middle;
    border-radius: 50%;
    margin: 0;
}

.current-row input[type='radio'] {
    background: #20a0ff;
    border-radius: 50%;
    border: none;
}

input[type='radio']:focus {
    outline: 0;
}

input[type='radio'] ~ .dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background-color: #fff;
    content: '';
    position: absolute;
    left: 6px;
    top: 6px;
    transform: scale(0, 0);
    transition: all 0.2s ease;
}

.current-row input[type='radio'] ~ .dot {
    transform: scale(1, 1);
    z-index: 5;
}
.radio {
    width: 18px;
    height: 18px;
    position: relative;
    display: inline-block;
    vertical-align: middle;
}